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中文摘要：
以聚乙二醇-6000（PEG-6000）为模板剂水热法制备碳酸氧铋（p-Bi2O2CO3）粉末，采用x射线衍射（XRD）、扫描电镜（SEM）、X射线光电子能谱（XPS）、透射电子显微镜（TEM）和紫外可见漫反射（DRS）对粉末进行了初步表征。在可见光（λ≥420nm）照射下，以罗丹明B（RbB）和水杨酸（SA）光催化降解实验为探针反应，实验结果表明，p-Bi2O2CO3具有较高的光催化活性，对RhB和SA有较好的降解效果。通过紫外-可见光谱（uV-Vis）、红外光谱（IR）和测定总有机碳（TOC）含量，光催化反应35h后RhB的矿化率为77％，同时对SA的降解率达到43％。同时，采用N，N-二乙基对苯二胺（DPD）分光光度法和对苯二甲酸荧光光度法分别测定了降解过程中H2O2和羟基自由基（·OH）的变化，表明p-Bi2O2CO3／Vis光催化降解机理涉及到·OH历程。
英文摘要：
Bismuthyl carbonate （p-Bi2O2CO3） powders were synthesized by hydro-thermal method using polyethylene glycol-6000 （PEG-6000） as the template. X-ray diffraction （XRD） , scanning electron microscopy （SEM） , X-ray photoelectron spectroscopy （XPS） , transmission electron microscopy （ TEM ） and UV-visible dif- fuse reflectance （DRS） were employed to characterize the powders. Under visible light （λ≥420nm） irradia- tion,the degradation of rhodamine B （RhB） and salicylic acid （SA） were used as probe reactions to investigate the catalytic performance of Bi2 O2 CO3 modified by PEG-6000 （p-Bi2 O2 CO3 ）. By analyzing the results of ultravi- olet-visible spectroscopy （UV-Vis） , infrared spectroscopy （IR） and total organic carbon （TOC）, the mineraliza- tion rate of RhB was 77% and the degradation rate of SA reached 43%. In addition,the concentration of hydro- gen peroxide （H2O2） and hydroxyl radical （ · OH） were determined by the N, N-diethyl-p-phenylenediamine （DPD） method and the fluorescence method, respectively, and the results demonstrated that the degradation of organic pollutants by p-Bi202CO3 under visible light illumination was dominated by · OH generated in the sys- tem.
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